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3Pcs/Set HSS Step Drill Bit Set 3-12mm 4-12mm 4-20mm Titanium Coated Wood Metal Drills Hole Cutter Power Woodworking Tools

£24.85
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  • Description


    Specification


    Brand: ROSSONIX

    Material: High quality HSS steel

    Function:Deburring, Chamfering, Cutting or Eexpanding holes

    Supporting tools: Pistol drill, Hand drill, Charging drill, Bench drill.

    Rotating Speed:

    3-12 Speed:260-400
    4-12 Speed:260-400
    4-20 Speed:180-240

    Length:

    3-12mm Length: Approx. 7.9cm/ 3.11″
    4-12mm Length: Approx. 6.7cm/ 2.64″
    4-20mm Length: Approx. 7.4cm/ 2.91″

    Package Includes:

    1 x Drill Bit 3-12mm
    1 x Drill Bit 4-12mm
    1 x Drill Bit 4-20mm
    1 x Bag

    Features

    100% Brand New and High Quality
    Made from high quality HSS steel
    Ideal for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc.
    Titanium coated to reduce mit and heat
    Heat treated and highly polished. Drills perfectly round holes in steel, brass, plastic, wood etc.
    3 sided shanks design in order to prevent slippage when in chuck
    Two flute design drives faster, smoother and cleaner cuts each step is clearly labeled with the depth diameter in steps

    Attention

    Because of the outer diameter of each step of the step drill is gradually expanded,then the corresponding cutting resistance and linear velocity will also be gradually increased.
    Owing to the step drill is completely dependent on the inclined edge that is only with 1mm length,If the feed speed is too fast when drilling,it will be easily to be annealing caused by abrasion of the oblique edge.
    Please give a downward force when drilling, do not press down too hard to avoid the edge wearing.

    Suitable Material

    Workpieces with general hardness, such as wood, plastic, PVC plate, iron plate, plate thickness within 3MM. Please note that stainless steel and spring steel are not applicable. Not for quenching. (Water injection cooling while working, it can effectively extend the service life of the drill bit, especially in the case of continuous drilling)

    This product is compatible with various models

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